* skip premdays and lastdays calculation when premdays = 65535 (gratis premium in TFS)
* TFS consider 65535 as gratis premium account and PHP_INT_MAX does not assume this value
* adds condition of premdays=65535 and standardize the label "gratis premium account" with tibia client
* adjust the label "days" when there is only one day of premium account
* adjusted premium account status
* Some small adjustment
* Sorry, typo.
Co-authored-by: slawkens <slawkens@gmail.com>
(cherry picked from commit 9d7854dda62468e420c26a6e531bacf47351f499)